It still seems like there should be a way to do this with only one color... but it's been tried many times before, and it seems there isn't quite enough room. (Not sure anyone has ever tried with Bellman, though.)

There are obviously many Heisenburps in this rule, but I find some of the glider ones particularly notable. Circuitry in this rule might be shorter, simpler and probably contain many reductions. However, the states make all the difference and some circuits might require certain stable state-changing gliders.